Circular sawing machine.



No. 663.863. Patented Dec. 18, I900.

- F. H. CLEMENT.

CIRCULAR SAWING MACHINE.

(Application filed Ju'ly 27, 1900.)

(No Model.) 2 Sheets-Sheet l.

WITNESSES: l/VVE/VTOI? No. 663,863. Patented Dec. l8, I900. r. H. CLEMENL CIRCULAR SAWING MACHINE.

(Aplication filed Jul 27, 1900.] (No Model.) 2 Shaats.-Sheet 2.

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UNTTnn STATES PATENT FFlCE.

FRANK H. CLEMENT, OF ROCHESTER, NEW YORK.

CIRCULAR SAWING MACHINE.

SBPECIFIGATION forming part of Letters Patent No. 663,863, dated December 18, 1900.

Application filed July 27, 1900. serial No. 25,028. kNo model.)

To all whom it may concern:

Be it known that I, FRANK H. CLEMENT, a citizen of the United States, residing at Rochester, in the county of Monroe and State of New York, have invented a new and useful Improvement in Circular Sawing Machines, of which the following is a specification.

My invention relates principally to the mounting and adjustment of the saw-arbors and arbor-boxes in that form of circular sawing machine in which the arbor or arbors are carried on gallows-frames which swing vertically from a point near the center of the driving-shaft, the most common application being to double cutting-off machines.

In the drawings, Figure 1 is a plan View of a double sawing-machine, showing the worktables and one arbor-yoke removed. Fig. 2 is an end elevation. Figs. 3 and e are enlarged elevations of the arbor-yoke and its supporting saddle-plate.

A A, Figs. 1 and 2, are gallows-frames which support the saw-arbors, and are pivoted at a to the head-blocks B, and are supported at the opposite end by means of the screws f and upright guides h. Hand-wheels j, connected to screws f by gearing, are used for adjusting the frames and superincumbent arbors vertically.

S represents saw-arbo'rs which in this style of machine are made with collars for holding saws at both ends and are boxed in a suitable manner on the frames A.

The head-blocks B are fitted to Vs or ways on the bed-plate C of the machine, and either or both are adjustable along the bed-plate to different distances apart by means of a screw and hand-wheel or in any other convenient manner.

D is the driving-shaft, extending the full length of the bed-plate and beyond at one end to receive tight and loose pulleys E, Fig. 1, by which the machine is driven. This driving-shaft has hearings on the bed-plate and also on one or both head-blocks, as shown at e c, Fig. 1.

F, Figs. 1 and 2, is a driving-pulley splined to the shaft D and fitted between the boxes 6 6, so as to be carried along the shaft by the head-block when it is adjusted on the bedplate. Pulleys F F are belted direct to the saw-arbors. G G (shown in dotted lines in Fig. l) arework-tables attached to each headblock and furnished with gages or stops of any suitable or desired form.

The above description relates to the ordinary form of double cutting-off sawing-machine, which is well known.

My invention consists of the following details: The saw-arbor boxes 7.". k are not mounted directly on the frame A, but on an intermediate sliding plate H, which is fitted to slide along ways 1 6, formed on the frame A. The plate H may be planed to fit \ls or dovetails, with a gib for taking up wear, or it may have flanges n n projecting over the sides of the ways Z, being clamped at any position on them by screws 0, moving in slots 19. The arbor-yoke M, with attached boxes 7c 7a, is provided with two curved bosses or rockers s, which rest on top of the plate H, and the yoke is held rigidly thereon by bolts 15, passing through transverse slots 1), Fig. 1.. Lugs 00 are cast .on the saddle-plate H, and setscrews on are provided to adjust the arboryoke transversely. At the opposite end of the arbor-yoke a central bolt '20, Figs. 1 and t, passes through the plate H and is threaded into the arbor-yoke, and very close to this is a set-screw w, threaded in the plate H and made to support the arbor-yoke against the pull of the bolt w. The bolt w thus becomes a pivot for one end of the arbor-yoke, and the set-screws 0c swing it transversely to give the required adjustment, and in like manner the bolt to and set-screw w swing the arborplate vertically on the rockers s, the boltsf being slackened for this purpose. For the purpose of moving the saddle-plate H and superincumbent arbor-yoke along the Ways Z I provide a screw Z, shouldered against a lug or boss cast on the frame A and threaded into the plate H.

The result of the above-described construction is that I am enabled to adjust and keep in adjustment the double saw-arbors with reference to each other and to the tables in either direction, and on account of the triangular arrangement of the clamp-screws i t w the yokes are held perfectly rigid when clamped without springing or straining. By means of the screw Z the belts driving the arbors S can be kept taut without continual stretching and relacing, as has heretofore been necessary. The sawyer is thus enabled to keep the saws in proper alinement for fine cutting notwithstanding the Wear of the bearings and to obtain sufficient power to operate them when the belt becomes slack by use.

Having thus described my invention, What I claim, and desire to secure by Letters Patent, is

1. The combination in a circular sawing machine of a swinging gallows-frame, a sliding plate adjustable thereon at right angles, or nearly so to a driving-shaft by means of a tension-screw, a saw-arbor yoke made independently adjustable on said sliding plate both vertically and horiz0ntally,whereby said arbor can be alined with its table or with another arbor, and the tension of the driving belt varied at will, substantially as described.

FRANK H. CLEMENT.

Witnesses:

G. CLARK SOUTHARD, BENJ. H. CLEMENT. 

